Generic Context Switching Implementation for Different Type of Schedulers

p-os commented 8 years ago

We need to implement a Context Switching Mechanism to switching between Tasks. We are planning to support different types of Schedulers so context switching mechanism should generic.

Following articles seem useful.

Taking advantage of the Cortex-M3’s pre-emptive context switches http://www.embedded.com/design/prototyping-and-development/4231326/Taking-advantage-of-the-Cortex-M3-s-pre-emptive-context-switches
Evaluations of Hardware and Software-Based Context Switching Methods in Cortex-M3 for Embedded Applications http://www.sersc.org/journals/IJSH/vol9_no2_2015/10.pdf
Setting up multiple stacks (Cortex™-M3 Technical Reference Manual) http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0337e/CIHIJIGD.html
SVC and PendSV (Cortex™-M3 Technical Reference Manual) https://books.google.com.tr/books?id=T9heqSaErCcC&pg=PA135&lpg=PA135&dq=cortex+m3+context+switch&source=bl&ots=ePuuy8Jc3w&sig=BbsdKWQQxbljlF403abY_XygcPM&hl=tr&sa=X&ved=0ahUKEwicuPHlhvrMAhWIwxQKHYLPDKkQ6AEIZTAI#v=onepage&q=cortex%20m3%20context%20switch&f=false

p-os commented 8 years ago

There are several RTOS' and we can also study them. But FreeRTOS (http://www.freertos.org/) implementation seems similar with our basic expectation.

p-os commented 8 years ago

Task is completed and merged to master branch.

Context Switching details will be added to wiki page.

ZA-YA / P-OS

Generic Context Switching Implementation for Different Type of Schedulers #38